Trolley-pulley.



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TROLLEY PULLEY.

APPLICATION 311,211 SEPT.26.1906.

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UNITED STATES PATENT OFFICE.

EMANUEL .T. MATTHEWS AND ROBERT C. GRUWELL, OF STOCKTON, CALIFORNIA.

TROLLEY-PULLEY.

Specification of Letters Patent.

Patented Feb. 11, 1908.

T 0 all whom it may concern:

Be it known that we, EMANUEL J. MAT- THEWS and ROBERT OGRUWELL, citizensof the United States, and residentsof Stockton, county of San Joaquin,State of California, have invented certain new and useful Improvementsin Trolley-Pulleys; and we do declare the following to be a full, clear,and exact description of the same, such as will enable others skilled inthe art to which it appertains to make and use the same, reference beinghad to the accompanying drawings, and the characters of reference markedthereon, which form a part of this specification.

This invention relates to trolley pulleys for electric .lines or fortramways, our main object being to provide a pulley which will remain incontact with the wire and not keep jumping off the same no matter at howhigh a rate of speed the vehicles may run. This object we accomplish bymeans of a plurality of spokes rotatably arranged in connection with thepulley proper adapted to hold the pulley on the wire and still permitthe same to pass the cross wires or supports. Also by such other andfurther construction as will appear by a perusal of the followingspecification and claims.

In the drawings similar characters of refer ence indicate correspondingparts in the several views.

Figure 1 is a side elevation of the device. Fig. 2 is a sectional sideelevation of the same. Fig. 3 is a view of a wire hanger.

1 designates the wire on which the pulley, supported by the holder 3,bears, said pulley belng mounted on a shaft 4 journaled in said holder3. sides of said pulley 2 are" hubs 5 provided with a series of spokesor fingers 6 said hubs being insulated from the shaft 4 by means ofsuitable material 7.

On the outer end .of each of the spokes 6 is journaled a small roller 8.

9 are metal plates provided with small flanges 10 on their lower sideson which the rollers 8 are adapted to bear, said plates 9 being securedtogether by means of cross pieces 11. Extending through the center oneof said cross pieces is a threaded pin 12 provided with a Wing nut onthe upper end thereof and said pin being secured to a frame 14 at thelower end in which frame are journaled two small pulleys 15 bearing onthe 7 upper side of the wire 1 and held securely in Mounted on Saidshaft 4,on both connection therewith by means of a spring 16 encirclingthe pin 12, the tension of which is regulated by means of the wing nut13.

In using our invention a hanger 17 must be used for holding the wire 1to permit the device to pass over the cross wires 18.

In practice the spokes 6 prevent the wire 1 from jumping from thepulley2 and yet when they come to a cross wire they engage the same and rotateand disengage themselves, the pulleys 15-also forming a more secure lockfor the said wire.

When the device is used simply for electric lines the pulleys 15 andtheir parts may be left ofi the same as the spokes 6 will be all that isrequired to keep the wire 1 within bounds. 1.

In connection with using the device on tramways or steel overheadrailways the device is inverted and the cars depended from the parts 9all the weight falling on the rollers 8 and spokes 6. This is of verygreat advantage as it pulls directly on a deadcenter on the wire thusdoing away with the inconveniences occasioned by the use of the sidehanger as is now the case in tram ways.

The above is a description of the details of construction of the presentand preferred embodiment of our invention. Many small deviations fromthe exact detail of such construction may be resdrted to however withoutdeparting from the spirit of our invention.

Having thus described our invention what we claim as new anduseful anddesire to secure by Letters Patent is:

1. A device of the class described comprising a holder and a shaftjournaled in said holder, a pulley mounted on said shaft and adapted totravel beneath a trolley wire, a plurality of radiating arms mounted forrotation upon said shaft at each side of said pulley, a frame havingguide pulleys spaced apart and adapted to travel above the trolley wire,a frame having spaced sides and between which the terminals of saidradial arms forth.

said rollers bearing on said flanges, as set 3. A device of thecharacter described comprising a holder, a shaft journaled therein, apulley mounted on said shaft, a series of arms rotatably mounted on saidshaft, small rollers journaled on the ends of such arms, two metalplates secured together by cross pieces, flanges on the lower edges ofsaid plates, said rollers being adapted to bear l on said flanges, athreaded pin mounted in the center one of said crosspieces and providedI with a wing nut on the upper end thereof and a frame on the lower endthereof a spring coil encircling said pin, and two small pul- 15 leysrotatably mounted on said frame, as set forth.

In testimony whereof we affix our signatures in presence of twowitnesses.

EMANUEL J. MATTHEWS. ROBERT C. GRUWELL. Witnesses:

PERCY S. WEBSTER, JosHUA B. WEBSTER.

